Fusion cage

Abstract

The fusion cage comprises an adjusting assembly and two supporting plates, the two supporting plates are arranged in the vertical direction, a first sliding way and a second sliding way are arranged on the supporting plates, the first sliding way is arranged close to the front ends of the supporting plates and obliquely extends inwards in the direction from front to back, and the second sliding way is arranged close to the rear ends of the supporting plates and obliquely extends inwards in the direction from front to back. The adjusting assembly comprises a first pushing block, a second pushing block and an adjusting part, the first pushing block and the second pushing block are arranged between the two supporting plates, the first pushing block is in sliding connection and clearance fit with the first sliding way, and the second pushing block is in sliding connection and clearance fit with the second sliding way; the adjusting piece is connected with the first push block and the second push block and can adjust the distance between the first push block and the second push block in the front-back direction of the supporting plate so as to adjust the height and the angle of the supporting plate. The height and the angle of the fusion cage can be adjusted, and the use requirements of different patients can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a fusion device. Background Art

[0002] Intervertebral fusion is one of the methods for treating spinal diseases, and more and more people are receiving intervertebral fusion treatment every year. Since most fusion devices are fixed structures, a single fusion device cannot restore the patient's cervical spine physiological curvature to the target physiological curvature during surgery. It is usually necessary to implant multiple fusion devices to work together to restore the patient's spinal physiological curvature, which also increases the workload of the operation and the number of patient incisions. Therefore, in order to make the fusion device meet the needs of different patients, it is a problem that needs to be solved in the current development of fusion devices to make the surgical process minimally invasive and set up a better adjustable structure. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides a fusion device having an adjustable structure, which is conducive to meeting the usage requirements of different patients.

[0005] The fusion device of an embodiment of the present invention includes: two support plates, the two support plates are arranged in the up-down direction, and the support plates are provided with a first slide and a second slide, the first slide is arranged adjacent to the front end of the support plate and extends obliquely inwardly from the front to the back direction, and the second slide is arranged adjacent to the rear end of the support plate and extends obliquely outwardly from the front to the back direction; an adjustment component, the adjustment component includes a first push block, a second push block and an adjustment member, the first push block and the second push block are arranged between the two support plates, the first push block is slidably connected to the first slide and has a clearance fit, the second push block is slidably connected to the second slide and has a clearance fit, the adjustment member is connected to the first push block and the second push block, and the adjustment member can adjust the distance between the first push block and the second push block along the front-to-back direction of the support plate to adjust the height and angle of the support plate.

[0006] According to the fusion device of the embodiment of the present invention, since the first push block is slidably connected to the first slide and has a clearance fit, and the second push block is slidably connected to the second slide and has a clearance fit, when the adjusting member drives the first push block and the second push block to approach each other, under the guiding effect of the first slide and the second slide and the action of the movable gap, the angle formed by the two support plates gradually increases, and the two support plates can move away from each other in the up and down directions, thereby the fusion device can be stretched to a height and angle suitable for the patient. On the other hand, since the first slide and the first push block cooperate with each other, and the second slide and the second push block cooperate with each other, the support plates can be prevented from separating from the first push block and the second push block in the up and down directions, thereby making the fusion device structure in the initial state more stable. Therefore, the fusion device of the embodiment of the present invention can adjust the height and angle, which is conducive to meeting the use needs of different patients.

[0007] In some embodiments, a first step surface is provided at the front end of the first slide, and the first step surface is orthogonal to the up and down directions of the support plate. The support plate has an initial state and an expanded state. In the initial state, the first push block is against the first step surface. In the expanded state, the first push block and the first step surface are staggered in the front and rear directions of the support plate, and the first push block cooperates with the first slide.

[0008] In some embodiments, the first slideway has a first sliding surface, the first push block has a first push surface, in the initial state, the first sliding surface is spaced apart from the first push surface and has an angle β, and the angle β is open outward, in the expanded state, the first sliding surface is in contact with the first push surface.

[0009] In some embodiments, in the initial state, the angle formed by the outer wall surfaces of the two support plates is α, wherein 6°≤α≤8°, and 3°≤β≤5°.

[0010] In some embodiments, a second step surface is provided at the rear end of the second slide, and the second step surface is orthogonal to the up and down directions of the support plate. The support plate has an initial state and an expanded state. In the initial state, the second push block abuts against the second step surface. In the expanded state, the second push block and the second step surface are staggered in the front and rear directions of the support plate, and the second push block cooperates with the second slide.

[0011] In some embodiments, the two support plates are respectively a first support plate and a second support plate, the first support plate is located on the upper side of the second support plate, the first support plate has a first fixing portion, the second support plate has a second fixing portion, the first fixing portion and the second fixing portion are both used for passing locking screws, and the first fixing portion and the second fixing portion are respectively arranged on the left and right sides of the second push block.

[0012] In some embodiments, the second slideway on the first support plate is disposed on the first fixing portion and arranged adjacent to the upper side of the first fixing portion, and the second slideway on the second support plate is disposed on the second fixing portion and arranged adjacent to the lower side of the second fixing portion.

[0013] In some embodiments, the support plate has a fixing portion, which is arranged on one side of the second push block along the left-right direction. The fusion device also includes a locking screw and a tensioning screw. The locking screw is passed through the fixing portion and is used to connect with the upper and lower vertebrae. The tensioning screw is engaged with the end of the locking screw.

[0014] In some embodiments, the adjusting member includes an adjusting bolt, a threaded hole is provided on the first push block, a through hole is provided on the second push block, the adjusting bolt passes through the through hole and cooperates with the threaded hole, and the adjusting bolt can be rotated to adjust the distance between the first push block and the second push block.

[0015] In some embodiments, the adjusting member also includes a retaining ring, which is installed on the adjusting bolt and located between the first push block and the second push block. When the adjusting bolt is screwed to the extreme position, the retaining ring can abut against the first push block or the second push block.

[0016] In some embodiments, the two support plates are respectively a first support plate and a second support plate, the first support plate is located on the upper side of the second support plate, the first support plate has a first front stop portion, the second support plate has a second front stop portion, the first front stop portion gradually extends downward, and the second front stop portion gradually extends upward; and / or, the first push block is provided with side stops on both sides along its left and right directions, and the side stops are located between the two support plates; and / or, bone grafting windows are provided on both support plates; and / or, both support plates are 3D printed parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of a fusion device according to an embodiment of the present invention.

[0018] Figure 2 Schematic diagram of a fusion device (after removing the locking screw) according to an embodiment of the present invention.

[0019] Figure 3 is a cross-sectional view of the fusion device in an initial state according to an embodiment of the present invention.

[0020] Figure 4 4 is a cross-sectional view of the fusion device in another position of the initial state according to the embodiment of the present invention.

[0021] Figure 5It is a cross-sectional view of the fusion device after the expansion angle of the fusion device according to the embodiment of the present invention is adjusted.

[0022] Figure 6 It is a cross-sectional view of another position of the fusion device after the expansion angle of the fusion device according to the embodiment of the present invention is adjusted.

[0023] Figure 7 Schematic diagram of a support plate of a fusion device according to an embodiment of the present invention.

[0024] Figure 8 Schematic diagram of the support plate of the fusion device according to the embodiment of the present invention from another perspective.

[0025] Fig. 9 Schematic diagram of the support plate of the fusion device according to the embodiment of the present invention from another perspective.

[0026] Fig.10 Schematic diagram of a first push block of a fusion device according to an embodiment of the present invention.

[0027] Fig.11 1 is a schematic diagram of the first push block of the fusion device according to the embodiment of the present invention from another perspective.

[0028] Fig.12 Schematic diagram of a second push block of a fusion device according to an embodiment of the present invention.

[0029] Fig.13 Schematic diagram of an adjusting member of a fusion device according to an embodiment of the present invention.

[0030] Fig.14 Schematic diagram of a clasp of a fusion device according to an embodiment of the present invention.

[0031] Fig.15 It is a schematic diagram of installing the locking screw and the tensioning screw of the fusion device according to an embodiment of the present invention.

[0032] Reference numerals:

[0033] 1. Support plate; 11. First slideway; 111. First slide surface; 12. Second slideway; 121. Second slide surface; 13. First step surface; 14. Second step surface; 151. First support plate; 152. Second support plate; 16. Fixing part; 161. First fixing part; 162. Second fixing part; 163. Locking hole; 171. First front stopper; 172. Second front stopper; 18. Bone grafting window;

[0034] 2. Adjustment assembly; 21. First push block; 211. First push surface; 212. Threaded hole; 213. Side stop; 22. Second push block; 221. Second push surface; 222. Holding groove; 223. Through hole; 23. Adjustment member; 231. Adjustment bolt; 24. Snap ring;

[0035] 31. Locking screw; 32. Tensioning screw. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0037] Please refer to the following Figures 1 to 15 A fusion device according to an embodiment of the present invention is described.

[0038] like Figures 1 to 6 As shown, the fusion device of the embodiment of the present invention comprises: an adjustment assembly 2 and two support plates 1. The two support plates 1 are arranged in the up-down direction, and a first slideway 11 and a second slideway 12 are provided on the support plates 1. The first slideway 11 is arranged adjacent to the front end of the support plate 1 and extends obliquely inwardly from the front to the back, and the second slideway 12 is arranged adjacent to the rear end of the support plate 1 and extends obliquely outwardly from the front to the back.

[0039] The adjustment assembly 2 includes a first push block 21, a second push block 22 and an adjustment member 23. The first push block 21 and the second push block 22 are both arranged between the two support plates 1. The first push block 21 is slidably connected to the first slide 11 and has a clearance fit. The second push block 22 is slidably connected to the second slide 12 and has a clearance fit. The adjustment member 23 is connected to the first push block 21 and the second push block 22. The adjustment member 23 can adjust the distance between the first push block 21 and the second push block 22 along the front and rear direction of the support plate 1 to adjust the height and angle of the support plate 1.

[0040] According to the fusion device of the embodiment of the present invention, since the first push block 21 is slidably connected to the first slide 11 and has a clearance fit, and the second push block 22 is slidably connected to the second slide 12 and has a clearance fit, when the adjustment member 23 drives the first push block 21 and the second push block 22 to approach each other, under the guiding effect of the first slide 11 and the second slide 12 and the action of the movable gap, the angle formed by the two support plates 1 gradually increases, and the two support plates 1 can move away from each other in the up and down directions, thereby the fusion device can be expanded to a height and angle suitable for the patient.

[0041] On the other hand, since the first slide 11 and the first push block 21 cooperate with each other, and the second slide 12 and the second push block 22 cooperate with each other, the support plate 1 can be prevented from separating from the first push block 21 and the second push block 22 in the up and down directions, thereby making the fusion structure in the initial state more stable.

[0042] Therefore, the fusion device in the embodiment of the present invention can adjust the height and angle, which is conducive to meeting the usage requirements of different patients, and has a wide range of applications and good stability, which is conducive to improving the fusion effect of the fusion device.

[0043] It should be noted that if Figure 3 and Figure 4 As shown, when the fusion device is in the initial state (i.e., not expanded), there is a movable gap between the slideway (the first slideway 11 or the second slideway 12) and the push block (the first push block 21 or the second push block 22), and the push block and the slideway are in a non-parallel state. Figure 5 and Figure 6 As shown, when the angle formed by the outer wall surfaces of the two support plates 1 of the fusion device gradually increases, that is, when the two support plates 1 rotate at an angle, the push block and the slideway gradually tend to be parallel.

[0044] It can be understood that, during the process of gradually expanding the two support plates 1 of the fusion device in the embodiment of the present invention, due to the presence of a movable gap between the slide (the first slide 11 or the second slide 12) and the push block (the first push block 21 or the second push block 22), when the first push block 21 and the second push block 22 push the support plate 1 to move, the support plate 1 will rotate slightly relative to the first push block 21 and the second push block 22 until the mating surfaces of the first slide 11 and the first push block 21 are parallel to each other, and the mating surfaces of the second slide 12 and the second push block 22 are parallel to each other, at which point the angle adjustment of the fusion device is completed.

[0045] When the matching surfaces of the slide (the first slide 11 or the second slide 12) and the push block (the first push block 21 or the second push block 22) are parallel, that is, when the angle of the fusion device is adjusted, the adjustment member 23 drives the first push block 21 and the second push block 22 to approach each other again. At this time, the two support plates 1 will move away from each other while keeping the angle unchanged.

[0046] In other words, the fusion device of the embodiment of the present invention is firstly adjusted in angle and then in height. The fusion device of the embodiment of the present invention adopts the above operation mode to reduce the handling of the fusion device during the operation, further simplify the operation steps and reduce the operation risk.

[0047] Alternatively, if Figure 3 and Figure 5 As shown, the front end of the first slide 11 is provided with a first step surface 13, and the first step surface 13 is orthogonal to the up-down direction of the support plate 1. The support plate 1 has an initial state and an expanded state. In the initial state, the first push block 21 abuts against the first step surface 13. In the expanded state, the first push block 21 and the first step surface 13 are staggered in the front-back direction of the support plate 1, and the first push block 21 cooperates with the first slide 11. It can be understood that when the fusion device is in the initial state (i.e., the fusion device is not expanded), the first push block 21 abuts against the first step surface 13 in the up-down direction, thereby limiting the first push block 21 from sliding or slightly rotating relative to the first slide 11, which is beneficial to improving the stability of the fusion device when it is used and facilitating the implantation of the fusion device into the patient's body.

[0048] When the adjusting member 23 drives the first push block 21 and the second push block 22 to approach each other, the abutting surface of the first push block 21 will gradually stagger with the first step surface 13 in the front-to-back direction, and the angle formed by the outer wall surfaces of the two support plates 1 will gradually increase. After the abutting surface of the first push block 21 and the first step surface 13 are staggered in the front-to-back direction, the adjusting member 23 continues to drive the first push block 21 and the second push block 22 to approach each other, at which time the first push block 21 will slide along the first slideway 11, thereby pushing the two support plates 1 to gradually move away from each other in the up-down direction, so as to increase the support height of the fusion device.

[0049] Specifically, Figure 4 and Figure 6 As shown, the first slideway 11 has a first sliding surface 111, and the first push block 21 has a first push surface 211. In the initial state, the first sliding surface 111 is spaced apart from the first push surface 211 and has an angle β, and the angle β opens outward. In the expanded state, the first sliding surface 111 fits with the first push surface 211. It can be understood that when the fusion device is in the initial state, there is a movable gap between the first sliding surface 111 and the first push surface 211, and an angle β is formed. When the two support plates 1 are gradually expanded, the first sliding surface 111 and the first push surface 211 gradually tend to be parallel and fit each other, thereby completing the angle adjustment of the support plate 1.

[0050] It should be noted that there are two first push surfaces 211 arranged on the upper and lower sides of the first push block 21, and the first sliding surface 111 of the upper support plate 1 and the first sliding surface 111 of the lower support plate 1 both cooperate with the corresponding first push surfaces 211. In the initial state, the first sliding surfaces 111 of the upper and lower support plates 1 both form an angle β with the corresponding first push surfaces 211.

[0051] Optionally, in the initial state, the angle formed by the outer wall surfaces of the two support plates 1 is α, wherein 6°≤α≤8°, 3°≤β≤5°. For example, α may be 6°, 7°, 8°, and β may be 3°, 4°, 5°.

[0052] Take α as 7° and β as 4° as an example. When the fusion device is in the initial state, the angle formed by the outer wall surfaces of the two support plates 1 is 7°, that is, the initial support angle of the fusion device is 7°. When the fusion device is expanded to the maximum value, the angle change of each support plate 1 is 4°, that is, the total angle change of the two support plates 1 is 8°. In other words, the maximum expansion angle of the fusion is 15°. The fusion device of the embodiment of the present invention sets the angle adjustment range to the above parameters, which can meet the use needs of most patients and has good structural stability.

[0053] For example, the height change of the fusion device can be 3 mm. That is, the height change of the fusion device from the initial state to the maximum height is 3 mm. This can meet the use needs of most patients and has good structural stability.

[0054] Alternatively, if Fig. 9 and Fig.12 As shown, the rear end of the second slide 12 is provided with a second step surface 14, and the second step surface 14 is orthogonal to the up and down directions of the support plate 1. The support plate 1 has an initial state and an expanded state. In the initial state, the second push block 22 is against the second step surface 14. In the expanded state, the second push block 22 is staggered with the second step surface 14 in the front and rear direction of the support plate 1, and the second push block 22 cooperates with the second slide 12.

[0055] It can be understood that when the fusion device is in the initial state (i.e., the fusion device is not expanded), the second push block 22 abuts against the second step surface 14 in the up and down directions, thereby limiting the second push block 22 from sliding or slightly rotating relative to the second slide 12, which is beneficial to improving the stability of the fusion device during use and facilitating the implantation of the fusion device into the patient's body.

[0056] like Fig. 9 and Fig.12 As shown, when the adjusting member 23 drives the first push block 21 and the second push block 22 to approach each other, the abutting surface of the second push block 22 will gradually stagger with the second step surface 14 in the front-to-back direction, and the angle formed by the outer wall surfaces of the two support plates 1 will gradually increase. After the abutting surface of the second push block 22 and the second step surface 14 are staggered in the front-to-back direction, the adjusting member 23 continues to drive the first push block 21 and the second push block 22 to approach each other, at which time the second push block 22 will slide along the second slideway 12, thereby pushing the two support plates 1 to gradually move away from each other in the up-down direction, so as to increase the support height of the fusion device.

[0057] Specifically, Fig. 9 and Fig.12 As shown, the second slideway 12 has a second sliding surface 121, and the second push block 22 has a second push surface 221. In the initial state, the second sliding surface is spaced apart from the second push surface 221 and has an angle β, and the angle β opens inward. In the expanded state, the second sliding surface fits the second push surface 221. It can be understood that when the fusion device is in the initial state, there is a movable gap between the second sliding surface and the second push surface 221, and an angle β is formed. When the two support plates 1 are gradually expanded, the second sliding surface and the second push surface 221 gradually tend to be parallel and fit each other, thereby completing the angle adjustment of the support plate 1. Exemplarily, when the fusion device is in the initial state, the angle β is 4°.

[0058] In some embodiments, Figures 3 to 6As shown, the two support plates 1 are respectively a first support plate 151 and a second support plate 152, the first support plate 151 is located on the upper side of the second support plate 152, the first support plate 151 has a first fixing portion 161, the second support plate 152 has a second fixing portion 162, the first fixing portion 161 and the second fixing portion 162 are both used to penetrate the locking screw 31, and the first fixing portion 161 and the second fixing portion 162 are respectively arranged on the left and right sides of the second push block 22. It can be understood that the locking screw 31 on the first fixing portion 161 is obliquely penetrated into the upper vertebra along the bottom-up direction, and the locking screw 31 on the second fixing portion 162 is obliquely penetrated into the lower vertebra along the top-down direction, thereby improving the stability of the fusion device implantation.

[0059] Alternatively, if Figure 1 and Figure 2 As shown, the second slideway 12 on the first support plate 151 is provided on the first fixing portion 161 and is arranged adjacent to the upper side of the first fixing portion 161, and the second slideway 12 on the second support plate 152 is provided on the second fixing portion 162 and is arranged adjacent to the lower side of the second fixing portion 162. In this way, the structural strength of the first support plate 151 and the second support plate 152 can be improved, and the risk of the first fixing portion 161 and the second fixing portion 162 being split when the locking screw 31 is tightened can be reduced.

[0060] Alternatively, if Figure 1 and Fig.15 As shown, the support plate 1 has a fixing portion 16 (i.e., a first fixing portion 161 and a second fixing portion 162), the fixing portion 16 is disposed on one side of the second push block 22 along the left-right direction, and the fusion device further includes a locking screw 31 and a tensioning screw 32, the locking screw 31 is passed through the fixing portion 16 and is used to connect with the upper and lower vertebrae, and the tensioning screw 32 is matched with the end of the locking screw 31. It can be understood that a locking hole 163 is provided on the fixing portion 16, the locking screw 31 is passed through the hole, and when the locking screw 31 is implanted, the tensioning screw 32 can be screwed on the end of the locking screw 31, thereby reducing the probability of the locking screw 31 and the fixing portion 16 being loosened, and improving the stability of the locking screw 31 after implantation.

[0061] Alternatively, if Figure 1 , Figure 2 and Fig.12 As shown, the upper and lower end surfaces of the second push block 22 are provided with holding grooves 222, so that the doctor can hold the fusion device by holding and clamping, thereby improving the convenience of implanting the fusion device.

[0062] In some embodiments, Figure 4 , Fig.12 and Fig.13As shown, the adjusting member 23 includes an adjusting bolt 231, a threaded hole 212 is provided on the first push block 21, and a through hole 223 is provided on the second push block 22. The adjusting bolt 231 is passed through the through hole 223 and cooperates with the threaded hole 212. The adjusting bolt 231 can be rotated to adjust the distance between the first push block 21 and the second push block 22. It can be understood that the end of the adjusting bolt 231 can stop on the second push block 22. When the doctor screws the adjusting bolt 231 into the threaded hole 212, the adjusting bolt 231 can drive the first push block 21 and the second push block 22 to approach each other, thereby improving the convenience of adjusting the fusion device, and the structural design is simple and easy to process and manufacture.

[0063] Alternatively, if Figure 4 , Fig.12 and Fig.13 As shown, the adjusting member 23 further includes a snap ring 24, which is mounted on the adjusting bolt 231 and is located between the first push block 21 and the second push block 22. When the adjusting bolt 231 is screwed to the limit position, the snap ring 24 can abut against the first push block 21 or the second push block 22. It can be understood that when the adjusting bolt 231 is screwed forward into the threaded hole 212 to the limit position, the snap ring 24 can stop against the first push block 21 to limit the further rotation of the adjusting bolt 231. When the adjusting bolt 231 is screwed out of the threaded hole 212 to the limit position, the snap ring 24 can stop against the second push block 22, thereby preventing the adjusting bolt 231 from being separated from the first push block 21 and the second push block 22, thereby improving the convenience of adjusting the adjusting member 23.

[0064] In some embodiments, Figures 3 to 6 As shown, the first support plate 151 has a first front stop 171, and the second support plate 152 has a second front stop 172. The first front stop 171 gradually extends downward, and the second front stop 172 gradually extends upward. It can be understood that when the fusion device is in the initial state, the first front stop 171 and the second front stop 172 are embedded together up and down. When the fusion device is gradually expanded, the first front stop 171 and the second front stop 172 can be gradually separated in the up and down direction. The fusion device of the embodiment of the present invention can avoid the problem of leakage of bone cement filled into the two support plates 1 at the front end of the fusion device by providing the first front stop 171 and the second front stop 172, thereby reducing the risk of surgery.

[0065] Alternatively, if Fig.11 and Fig.12 As shown, the first push block 21 is provided with side blocks 213 on both sides along the left and right directions thereof, and the side blocks 213 are located between the two support plates 1. It can be understood that the first push block 21 is provided with side blocks 213 on both sides, and the two side blocks 213 can prevent the bone cement filled into the two support plates 1 from leaking on the left and right sides of the fusion device, thereby reducing the risk of surgery.

[0066] Alternatively, if Figure 1 and Figure 2 As shown, both support plates 1 are provided with bone grafting windows 18, for example, bone grafting windows 18 are provided on the upper wall surface of the first support plate 151 and the lower wall surface of the second support plate 152. This can improve the fusion effect between the fusion device and the upper and lower adjacent vertebrae and improve the stability of the fusion device after implantation.

[0067] Optionally, both support plates 1 are 3D printed parts, so that the support plates 1 can be set to a porous structure, thereby improving the fusion effect of adjacent vertebrae and controlling the elastic modulus of the fusion device.

[0068] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0069] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0070] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0072] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0073] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A fusion device, characterized in that: include: Two support plates, the two support plates are arranged in the up-down direction, the support plates are provided with a first slideway and a second slideway, the first slideway is arranged adjacent to the front end of the support plate and extends obliquely inwardly from the front to the rear, and the second slideway is arranged adjacent to the rear end of the support plate and extends obliquely outwardly from the front to the rear; An adjustment component, the adjustment component includes a first push block, a second push block and an adjustment member, the first push block and the second push block are arranged between the two support plates, the first push block is slidably connected to the first slide and has a clearance fit, the second push block is slidably connected to the second slide and has a clearance fit, the adjustment member is connected to the first push block and the second push block, and the adjustment member can adjust the distance between the first push block and the second push block along the front and rear directions of the support plates to adjust the height and angle of the support plates.

2. The fusion device according to claim 1, characterized in that: A first step surface is provided at the front end of the first slide, and the first step surface is orthogonal to the up and down directions of the support plate. The support plate has an initial state and an expanded state. In the initial state, the first push block abuts against the first step surface. In the expanded state, the first push block and the first step surface are staggered in the front and rear directions of the support plate, and the first push block cooperates with the first slide.

3. The fusion device according to claim 2, characterized in that: The first slideway has a first sliding surface, and the first push block has a first push surface. In the initial state, the first sliding surface is spaced apart from the first push surface and has an angle β, and the angle β is open outward. In the expanded state, the first sliding surface fits the first push surface.

4. The fusion device according to claim 3, characterized in that: In the initial state, the angle formed by the outer wall surfaces of the two support plates is α, wherein 6°≤α≤8°, and 3°≤β≤5°.

5. The fusion device according to claim 1, characterized in that: A second step surface is provided at the rear end of the second slide, and the second step surface is orthogonal to the up and down directions of the support plate. The support plate has an initial state and an expanded state. In the initial state, the second push block abuts against the second step surface. In the expanded state, the second push block and the second step surface are staggered in the front and rear directions of the support plate, and the second push block cooperates with the second slide.

6. The fusion device according to claim 1, characterized in that: The two support plates are respectively a first support plate and a second support plate, the first support plate is located on the upper side of the second support plate, the first support plate has a first fixing portion, the second support plate has a second fixing portion, the first fixing portion and the second fixing portion are both used for passing locking screws, and the first fixing portion and the second fixing portion are respectively arranged on the left and right sides of the second push block.

7. The fusion device according to claim 6, characterized in that: The second slideway on the first support plate is disposed on the first fixing portion and arranged adjacent to the upper side of the first fixing portion, and the second slideway on the second support plate is disposed on the second fixing portion and arranged adjacent to the lower side of the second fixing portion.

8. The fusion device according to claim 1, characterized in that: The support plate has a fixing portion, which is arranged on one side of the second push block along the left-right direction. The fusion device also includes a locking screw and a tensioning screw. The locking screw is passed through the fixing portion and is used to connect with the upper and lower vertebrae. The tensioning screw is matched with the end of the locking screw.

9. The fusion device according to claim 1, characterized in that: The adjusting member comprises an adjusting bolt, a threaded hole is provided on the first push block, a through hole is provided on the second push block, the adjusting bolt passes through the through hole and cooperates with the threaded hole, and the adjusting bolt can be rotated to adjust the distance between the first push block and the second push block.

10. The fusion device according to claim 9, characterized in that: The adjusting member further comprises a retaining ring, which is mounted on the adjusting bolt and located between the first push block and the second push block. When the adjusting bolt is screwed to a limit position, the retaining ring can abut against the first push block or the second push block.

11. The fusion device according to any one of claims 1 to 10, characterized in that: The two support plates are respectively a first support plate and a second support plate, the first support plate is located on the upper side of the second support plate, the first support plate has a first front stop portion, the second support plate has a second front stop portion, the first front stop portion gradually extends downward, and the second front stop portion gradually extends upward; And / or, the first push block is provided with side stoppers on both sides along the left-right direction thereof, and the side stoppers are located between the two support plates; And / or, bone grafting windows are provided on both support plates; And / or, both of the two support plates are 3D printed parts.

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